Laser cutting study on 30 mm thick stainless steel for application in decommissioning of calandria shells in heavy-water reactors
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Laser cutting studies were performed on 30 mm thick stainless steel using a 6-kW fiber laser, focusing on its application in the decommissioning of calandria shells in heavy-water reactors. Proper cutting speeds for various focal lengths were determined, and the amount of secondary waste was evaluated. Additionally, for practical applications, the stability of cutting was assessed through change-of-direction and long-length cutting tests. The chosen cutting head allowed for successful cutting of 30 mm thick stainless steel at speeds exceeding 250 mm/ min. The average kerf width was 1.18 mm, and the amount of secondary waste was 279.4 g/m expressed as mass per unit length. Both change-of-direction and long-length cutting were successfully executed without any failures using this head. These results are expected to provide valuable data for the dismantling of calandria shells in heavy-water reactors in future decommissioning projects.
Abstract
Laser cutting studies were performed on 30 mm thick stainless steel using a 6-kW fiber laser, focusing on its application in the decommissioning of calandria shells in heavy-water reactors. Proper cutting speeds for various focal lengths were determined, and the amount of secondary waste was evaluated. Additionally, for practical applications, the stability of cutting was assessed through change-of-direction and long-length cutting tests. The chosen cutting head allowed for successful cutting of 30 mm thick stainless steel at speeds exceeding 250 mm/ min. The average kerf width was 1.18 mm, and the amount of secondary waste was 279.4 g/m expressed as mass per unit length. Both change-of-direction and long-length cutting were successfully executed without any failures using this head. These results are expected to provide valuable data for the dismantling of calandria shells in heavy-water reactors in future decommissioning projects.